SeasonMapJamestown weather in August
Saint Helena
August in Jamestown: nice, dry — an excellent time to visit.
#9 of 12 months in Jamestown · #304 of 1383 destinations to visit in August · comfort 88/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Jamestown in August
No notes yet. Open Jamestown on the map to add the first one.
Jamestown climate normals — August
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 19°C / 67°F | |
| Sea temperature | 21°C / 69°F | 🌊 fresh |
| Rainfall | 4 mm / 0.2 in | ☀️ dry |
| Rainy days | 1 days | |
| Humidity | 73% | 💧 humid |
| Dew point | 14°C / 58°F | |
| Sunshine | 10 h/day | |
| Daylight | 11.6 h | |
| Wind | 33 km/h / 21 mph | |
| Air quality (US AQI) | 53 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Jamestown in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 4 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Jamestown's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherJamestown's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Jamestown in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Humpback whales
15 Jun – 15 Dec · usuallyWhale seasonHumpbacks use the island's waters through the southern winter and spring, with mothers and calves close in along the lee coast. Sightings are opportunistic rather than scheduled.
Where is Jamestown?
Jamestown in August — FAQ
- Is August a good time to visit Jamestown?
- August in Jamestown: nice, dry — an excellent time to visit. It ranks #9 of 12 months for Jamestown on SeasonMap's comfort score (88/100).
- What is the weather like in Jamestown in August?
- In August, Jamestown averages a daily high of 20°C and a low of 19.2°C, with about 4.1 mm of rain over roughly 1 rainy days.
- What is the air quality in Jamestown in August?
- Jamestown has a mean US Air Quality Index of about 53 in August.